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The Wayback Machine - https://web.archive.org/web/20220119210124/https://blog.chromium.org/search/label/mobile
Chromium Blog
News and developments from the open source browser project
Data Compression in Chrome Beta for Android
Tuesday, March 5, 2013
Today’s Chrome Beta for Android
update
brings your saved passwords and autofill entries from your desktop to your phone and tablet. This release also introduces an experimental data compression feature that will yield substantial bandwidth savings. This feature is powered by a connection to a
SPDY
proxy running on Google’s servers, paired with content optimization performed by our
open-source PageSpeed libraries
, specifically tuned for Chrome Beta on Android.
By using SPDY, the proxy is able to multiplex multiple request and response streams in parallel over a single TCP connection to your phone or tablet. When this new feature is enabled (enable the “Experimental Data Compression Proxy” under
chrome://flags
) the browser-to-proxy connection is over SSL, for a more secure browsing experience. In addition, only HTTP traffic is routed through and optimized by the proxy, so secure (HTTPS) requests will bypass the proxy and continue to connect directly to the destination. Furthermore, DNS lookups are performed by the proxy, instead of on the mobile device. Turning on this experimental feature also enables
Safe Browsing
.
For an average web page, over 60% of the transferred bytes are images. The proxy optimizes and transcodes all images to the
WebP format
, which requires fewer bytes than other popular formats, such as JPEG and PNG. The proxy also performs intelligent compression and minification of HTML, JavaScript and CSS resources, which removes unnecessary whitespace, comments, and other metadata which are not essential to render the page. These optimizations, combined with mandatory gzip compression for all resources, can result in substantial bandwidth savings.
For a deeper dive into the technical details, check out our
whitepaper
in Chrome for Android’s developer documentation. The latest version of Chrome Beta for Android is available on
Google Play
(use the link, you won't find it in search)! We look forward to your early
feedback
.
Posted by Matt Welsh, Software Engineer & Mobile Web Performance Gearhead
Update April 10, 2013:
To enable this experimental data compression feature, go to “Bandwidth Management” in Settings and enable “Reduce Data Usage.” From the most recent Chrome Beta for Android
release
onwards, no need to look under
chrome://flags
.
A deeper look at Chrome for Android
Tuesday, February 7, 2012
Today,
we introduced
Chrome for Android Beta, which brings Chrome’s capabilities to phones and tablets running Android 4.0, Ice Cream Sandwich. This is made possible by a range of
innovative features
and by building a mobile browser from the ground up that makes full use of the underlying architecture built into Android 4.0.
Chrome for Android brings support for many of the latest
HTML5 features
to the Android platform. With hardware-accelerated canvas, overflow scroll support, strong HTML5 video support, and new capabilities such as Indexed DB, WebWorkers and Web Sockets, Chrome for Android is a solid platform for developing web content on mobile devices.
In addition to support for the latest web technologies, we hope to make interactive web content super easy to develop. Chrome for Android introduces
remote debugging
through
Chrome Developer Tools
to make it simple for developers to debug web sites running live on their mobile devices.
Much of the code for Chrome for Android is already shared with Chromium and over the coming weeks, the Chromium team will be upstreaming many new components developed for Chrome for Android to Chromium, WebKit and other projects.
We’ve got a lot more planned to make Chrome as feature-rich on mobile devices as it is on the desktop. We encourage you to follow any of the ongoing development via the
issue tracker
or join in on chromium-dev@chromium.org.
Posted by Arnaud Weber, Engineering Manager, Chrome
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